Don't end missions automatically when objectives are reached

[learnedSloth]

Instead players should be able to end the mission manually once the objectives have been completed.
Currently we consciously avoid it until researches are done and units rebuilt.
Requiring return to the LZ is a kludge and works on away missions only.

[montetank]

OK-We will have to wait until all research is completed. But isn't that nice? In the meantime we can grab a beer or devote ourselves to the wife. I remember when I played for the first time (2001) and unfortunately never had time for it,